OFFSET
1,1
COMMENTS
Some of the larger terms correspond to probable primes.
LINKS
H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
H. Lifchitz, Mersenne and Fermat primes field
Paul Bourdelais, A Generalized Repunit Conjecture [From Paul Bourdelais, Mar 24 2010]
PROG
(Prime95) PRP=1, 21, 394579, 1, 0, 0, "22"
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 15 2000
EXTENSIONS
a(7) from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
a(8) corresponds to a probable prime discovered by Paul Bourdelais, Mar 22 2010
a(9) corresponds to a probable prime discovered by Paul Bourdelais, Mar 24 2010
a(10) corresponds to a probable prime discovered by Paul Bourdelais, Aug 30 2013
a(11) corresponds to a probable prime discovered by Paul Bourdelais, Oct 23 2018
STATUS
approved